[OMP] Fatal error when creating a series menu item without content

[jonasraoni]

Describe the bug
After creating a series menu item without linking it to any item (see image below), a fatal error happens.

PHP Fatal error:  Uncaught TypeError: PKP\section\Repository::get(): Argument #1 ($id) must be of type int, string given, called in classes/services/NavigationMenuService.php on line 157 and defined in lib/pkp/classes/section/Repository.php:58
Stack trace:
#0 classes/services/NavigationMenuService.php(157): PKP\section\Repository->get()
#1 [internal function]: APP\services\NavigationMenuService->getDisplayStatusCallback()
#2 lib/pkp/classes/plugins/Hook.php(139): call_user_func_array()
#3 lib/pkp/classes/plugins/Hook.php(113): PKP\plugins\Hook::run()
#4 lib/pkp/classes/services/PKPNavigationMenuService.php(382): PKP\plugins\Hook::call()

The strange thing that needs to be analyzed is that a call to $navigationMenuItem->getPath() outputs Laravel code �*�escapeWhenCastingToString.

A workaround must be left for bad cases, and the field should be probably turned into required. If the ID is a physical field, it can be setup as not null, but a further script should clear invalid data on the upgrade.

It's also needed to check if the bug applies to OMP 3.3

To Reproduce

1. Create a series menu item, like in the sample image
2. Add it to the navigation
3. See the error

What application are you using?
OMP 3.4